ตัวแปลงไฟล์ออนไลน์ฟรี PPM เป็น CGM

PPM is a simple format for storing images portable pixmap: color (PPM), grayscale (PGM) and black and white (PBM). These formats can provide an intermediate representation of the data when converting raster image files listed three types between different platforms. PPM format was developed by Jeff Poskanzerom.

This is used to exchange vector graphics among different platforms. It stores not only 2D vector images, but also raster images. It allows you to store a large number of graphical information types and is applied primarily for design in aviation, engineering and other technical fields.